diff --git a/analytics/testapp/Assets/Firebase/Sample/Analytics/UIHandler.cs b/analytics/testapp/Assets/Firebase/Sample/Analytics/UIHandler.cs
index 42a597ca1..1a7aa827b 100644
--- a/analytics/testapp/Assets/Firebase/Sample/Analytics/UIHandler.cs
+++ b/analytics/testapp/Assets/Firebase/Sample/Analytics/UIHandler.cs
@@ -62,6 +62,8 @@ void InitializeFirebase() {
       FirebaseAnalytics.SetAnalyticsCollectionEnabled(true);
       DebugLog("Initiate on-device conversion measurement.");
       FirebaseAnalytics.InitiateOnDeviceConversionMeasurementWithEmailAddress("test@testemail.com");
+      DebugLog("Initiate on-device conversion measurement (phone number).");
+      FirebaseAnalytics.InitiateOnDeviceConversionMeasurementWithPhoneNumber("+15551234567");
 
       DebugLog("Set user properties.");
       // Set the user's sign up method.
diff --git a/docs/readme.md b/docs/readme.md
index 00244b265..f54b78655 100644
--- a/docs/readme.md
+++ b/docs/readme.md
@@ -71,6 +71,12 @@ Support
 
 Release Notes
 -------------
+### Upcoming Release
+- Changes
+    - Analytics (iOS): Added InitiateOnDeviceConversionMeasurementWithPhoneNumber
+      function to facilitate the [on-device conversion
+      measurement](https://support.google.com/google-ads/answer/12119136) API.
+
 ### 11.4.0
 - Changes
     - General: Update to Firebase C++ SDK version 11.4.0.